Gsm Transmitters; Gsm900/1800/1900 Tx Troubleshooting - Nokia 6233 Service Manual

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NO. Signal Name
1 RXIP (out)
2 RXQP (OUT)
3 VC1_TXFEM
4 VC2_TXFEM
5 VC3_TXFEM
1
1 Measure RXIP
2 .
and RXQP
2 Measure front end module control signal voltages

GSM Transmitters

GSM900/1800/1900 TX Troubleshooting

Preparations
Make the following settings:
Page 7 –8
Test point
J7515 124mVpp,
730mVDC
J7517 124mVpp,
730mVDC
J7530 0V
J7531 0V
J7532 0V
Figure 47 GSM900/1800/1900 RX test points
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GSM900 GSM1800
106mVpp,
760mVDC
106mVpp,
690mVDC
0V
2.7VDC
0V
3, 4 and 5 .
RM-123; RM-145
RF troubleshooting
GSM1900
100mVpp,
780mVDC
100mVpp,
690mVDC
0V
2.7VDC
2.7VDC
Issue 1